Merciless is a Manga/Manhwa/Manhua in (English/Raw) language, Action series, english chapters have been translated and you can read them here. You are reading chapters on www.mangageko.com fastest updating comic site. The Summary is ‘Do Janggon’ is a human weapon and forcer special forces spy against North Korea. When both of his arms got injured he was caught and brought to the ‘Daesan Welfare Center’, that abuses human rights and exploits labor. The doctor said it would take him a month to fully recover. So he has to hold out in the welfare center until his arms are healed.